Drinking cup



FIG. 1 is a perspective view of my new design;

FIG. 2 is a side view of my new design;

FIG. 3 is a top view of my new design; and,

FIG. 4 is a cross-sectional side view taken along line 4—4 of FIG. 3 of my new design. 

The ornamental design for a drinking cup, as shown and described. 